Programming Functions
24 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does the term 'pure' in pure function refer to?

  • The function is used in mathematical operations only
  • The function is fast and efficient
  • The function is simple and easy to understand
  • The function always returns the same result for the same inputs (correct)

    • What is a characteristic of a pure function?

  • It returns a random result
  • It changes the input values
  • It always gives the same result when the same arguments are passed (correct)
  • It can only be used with mathematical functions

    • Which of the following is not a characteristic of a pure function?

  • It can be used with any type of function
  • It always gives the same result for the same inputs
  • It can be used in any programming language
  • It can change the input values (correct)

    • Why are pure functions useful?

    <p>They are predictable and do not have side effects</p> Signup and view all the answers

    What is an example of a pure function?

    <p>The sin function</p> Signup and view all the answers

    What is a benefit of using pure functions?

    <p>They can be composed together easily</p> Signup and view all the answers

    What is a consequence of using pure functions?

    <p>The code becomes more predictable</p> Signup and view all the answers

    What is a requirement for a function to be considered pure?

    <p>It must always return the same result for the same inputs</p> Signup and view all the answers

    What is the main characteristic of a pure function?

    <p>It does not depend on external variables.</p> Signup and view all the answers

    What is the advantage of having a pure function?

    <p>It allows the compiler to optimize the function call.</p> Signup and view all the answers

    What is the definition of an interface in the context of a car?

    <p>The accelerator of the car.</p> Signup and view all the answers

    What happens when the driver presses the accelerator?

    <p>The engine does all the internal work.</p> Signup and view all the answers

    Why is the function 'square' considered a pure function?

    <p>It does not depend on external variables and always gives the same result for the same input.</p> Signup and view all the answers

    What is the main advantage of separating the interface from the implementation?

    <p>It separates the concerns of the driver and the engine.</p> Signup and view all the answers

    What is the role of the accelerator in the car?

    <p>It is the interface between the driver and the engine.</p> Signup and view all the answers

    What is an example of a pure function?

    <p>A function that does not depend on external variables and always gives the same result for the same input.</p> Signup and view all the answers

    What is a key characteristic of a pure function?

    <p>It produces a concrete output</p> Signup and view all the answers

    What is the purpose of function definitions?

    <p>To bind values to names</p> Signup and view all the answers

    What is the main difference between definitions and expressions?

    <p>Definitions are distinct syntactic blocks</p> Signup and view all the answers

    What is a key benefit of using subroutines in programming?

    <p>Reusability of code</p> Signup and view all the answers

    What is the primary criterion for evaluating the performance of an algorithm?

    <p>Computation time</p> Signup and view all the answers

    What is an example of a statement in a programming language?

    <p>A variable declaration</p> Signup and view all the answers

    What is the purpose of parameters in a function definition?

    <p>To pass values to the function</p> Signup and view all the answers

    What is the relationship between definitions and expressions in programming?

    <p>Definitions can have expressions nested inside them</p> Signup and view all the answers

    Study Notes

    Function

    • A function is a block of code that works on many kinds of inputs, like variants, expressions, and produces a concrete output.
    • Functions can be categorized into pure functions and impure functions (with side effects).

    Pure Functions

    • Pure functions are functions that give exact results when the same arguments are passed.
    • They always produce the same output for the same input, making them predictable and reliable.
    • Example: The mathematical function sin(0) always results in 0.
    • Advantages of pure functions include:
      • The compiler only needs to call the function once if it's called several times with the same arguments.

    Function Specification

    • A function specification is a set of code that defines the function's behavior.
    • It includes parameters (variables) and arguments (values passed to the function).
    • Parameters are the variables in a function definition, and arguments are the values passed to the function.

    Interface vs Implementation

    • The interface is the part of a function that the user interacts with, while the implementation is the internal workings of the function.
    • The interface separates the user from the internal implementation, allowing for changes to be made without affecting the user.

    Parameters and Arguments

    • Parameters are the variables in a function definition.
    • Arguments are the values passed to a function when it's called.
    • Example: In the function let square x := return: x * x, x is a parameter, and the value passed to x is an argument.

    Subroutines

    • Subroutines are the basic building blocks of computer programs.
    • They are used to increase the speed of computation by repeating tasks multiple times.

    Time Complexity

    • Time complexity is an important consideration in algorithm design, as it affects the duration of computation time.
    • The duration of computation time should be independent of the programming language, compiler, and computer used.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    12th_Computer-Science_EM - www.tntextbooks.in.pdf

    Description

    Learn about functions, a block of code that works on various inputs, and how they can be categorized into pure and impure functions. Understand the characteristics of pure functions and their predictable output.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser